[time-nuts] help understanding drift in two ptpd-synchronized systems

[Hal Murray]

> Similarly, ‘drift’ seems to be the long term averaged (and scaled) offset.

Offset without a qualifier usually means time offset.  (At least where I hang 
out.)

Drift is frequency offset rather than time offset.  It is usually expressed as 
a (tiny) fraction rather than directly in Hz, typically PPM or PPT.

As Magnus points out, a frequency offset turns into a phase/time drift.

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